Circulating fluidized bed boiler combustion self-adaptive control system and method

Abstract

The invention provides a circulating fluidized bed boiler combustion self-adaptive control system and method. The control system comprises a self-tuning controller and an RBF neural network model estimator. The RBF neural network model estimator executes model estimation. The self-tuning controller conducts tuning, control and decoupling compensation on model control characteristic parameters given by an RBF neural network and outputs control the control quantity vector. The control method comprises the steps of setting the given quantity vector and collecting the control quantity vector; collecting the output quantity vector; inputting the control quantity vector and the output quantity to act on the RBF neural network model estimator to execute model estimation, and outputting the modelcontrol characteristic parameters to the self-tuning controller; taking the given quantity vector and the output quantity vector as feedback, inputting a control gain matrix into the self-tuning controller to enable the self-tuning controller to complete parameter tuning and decoupling compensation so as to complete self-adaptive control of the circulating fluidized bed boiler combustion system. The circulating fluidized bed boiler combustion self-adaptive control system is safe in control and stable in operation.

Description

technical field [0001] The invention relates to a boiler combustion control system and method, in particular to a circulating fluidized bed boiler combustion adaptive control system and method. Background technique [0002] Circulating fluidized bed boilers have the characteristics of wide fuel applicability, low combustion temperature, wide load adjustment range, and meeting environmental protection requirements, and are widely used in electric power and thermal power industries. The combustion particles of the circulating fluidized bed boiler are large, the combustion process is long, and the thermal inertia of the boiler is large, which makes the combustion process of the fluidized bed boiler have a large hysteresis characteristic. Main steam pressure, hearth temperature, flue gas oxygen content, hearth pressure and other working conditions interact with each other, especially the coupling between main steam pressure and hearth temperature is serious; boiler fuel volume, ...

AI Technical Summary

Problems solved by technology

The hearth temperature changes frequently due to factors such as coal quality and load. When the primary air is used to control the hearth temperature, the frequent changes will seriously affect the fluidization state of the bed material and threaten the safe operation of the boiler.

Automatic control can only operate automatically in a local area under a stable environment. When the boiler load or coal type has a large change, it cannot operate stably and automatically for a long time

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